Current projections hold that the population of the world will increase from 6.9 billion in early 2011 to somewhere between 9.0 and 9.3 billion by 2050, an increase of over 30 percent. When that increase is coupled with increased prosperity in developing countries and the desire for a diet that includes more meat, it is projected that the production of agricultural crops will need to increase by 70 to 100 percent.

The question facing policy makers is what it takes to accomplish that amount of increase over the next 40 years. The multinationals that are engaged in seed research and sales argue that such an ambitious agenda will only be achieved if trade policies are liberalized and they are given free rein to sell their genetically modified seed everywhere. They also argue that farmers in the major grain exporting countries will be needed to feed the world.

Before moving forward, let us look at what has happened to grain production over the last 40 years. In 1970, production of corn, milled rice, and wheat was 788 million tonnes. By 2010, the production of those three grains was 1.912 billion tonnes, an increase of 142 percent.

Looking at the grains individually, corn production increased from 268 million tonnes to 814 million tonnes, an increase of over 200 percent. The production of milled rice increased from 213 million tonnes in 1970 to 452 million tonnes in 2010—an increase of over 110 percent. Wheat production, the largest of the three grains in 1970, was 307 million tonnes. By 2010, wheat production had increased by over 110 percent to 648 million tonnes.

For all three grains, the 40-year increase was over 140 percent. If you had asked most people in 1970 if they thought that production would more than double over the next 40 years, they probably would have said, “No.”

In the 1970s, it was expected that grain production in India would lag consumption and India would continue to be dependent upon imports. In 1970, India was a net importer of 3.2 million tonnes of the three grains, mostly wheat. By 2010, India was a net exporter of 4.8 million tonnes of the three grains. The 2010 exports were almost evenly divided between corn and milled rice.

In addition, soybean production was 42 million tonnes in 1970. By 2010, world production of soybeans had increased to 258 million tonnes—that’s a whopping 513 percent increase. So, the two commodities that are most critical to meat production have seen dramatic increases the last 40 years.

Can farmers worldwide make the 70 to 100 percent production increases that are projected to be needed? If the last 40 years is any indicator, the answer is yes, though perhaps a guarded yes.

Let us look at the guarded part first. In this area we start with climate change. As the result of a recent column on climate change we have become abundantly aware that this is a contentious issue for some and a matter of fact for others. That being said, as academics looking 40 years down the road, as one of our scenarios, we would be irresponsible if we did not look at the potential impact of climate change on agriculture.

Some research suggests that increased carbon dioxide in the atmosphere may aid in photosynthesis and crop yields as long as temperatures do not increase too much. A sharp increase in temperatures in a given location could result in lower yields despite the increased availability of carbon dioxide. The factors that could affect yield include higher temperatures, shifting production areas, increased weather variability, and the increased likelihood of severe weather events. In some sense, climate change is the wild card in the deck. We have never been there before and we don’t know exactly what to expect. Nonetheless, we need to be prepared for the potential changes we face in this area.